coverity#1190351 Missing break in switch

it's been like this since the initial checkin
of 2000, so I got to assume it's intentional

Change-Id: Ifc1300c193f2ddbc3f9ab978464199432430fd8b

sw/source/core/layout/fly.cxx

@@ -1036,7 +1036,7 @@ void SwFlyFrm::_UpdateAttr( const SfxPoolItem *pOld, const SfxPoolItem *pNew,
                 else if ( GetPrevLink() )
                     SwFlyFrm::UnchainFrames( GetPrevLink(), this );
             }
-
+            //fall-through
         default:
             bClear = false;
     }